<template>
  <div style="margin-top: 50px">
    <el-form :model="value" :rules="rules" ref="productInfoForm" label-width="120px" class="form-inner-container" size="small">
      <el-form-item label="商品分类：" prop="productCategoryId">
        <el-cascader
          v-model="selectProductCateValue"
          :options="productCateOptions">
        </el-cascader>
      </el-form-item>
      <el-form-item label="商品名称：" prop="name">
        <el-input v-model="value.name"></el-input>
      </el-form-item>
      <el-form-item label="副标题：" prop="subTitle">
        <el-input v-model="value.subTitle"></el-input>
      </el-form-item>
      <el-form-item label="商品品牌：" prop="brandId">
        <el-select
          v-model="value.brandId"
          @change="handleBrandChange"
          placeholder="请选择品牌">
          <el-option
            v-for="item in brandOptions"
            :key="item.value"
            :label="item.label"
            :value="item.value">
          </el-option>
        </el-select>
      </el-form-item>
      <el-form-item label="商品介绍：">
        <el-input
          :autoSize="true"
          v-model="value.description"
          type="textarea"
          placeholder="请输入内容"></el-input>
      </el-form-item>
      <el-form-item label="商品货号：">
        <el-input v-model="value.productSn"></el-input>
      </el-form-item>
      <el-form-item label="商品售价：">
        <el-input v-model="value.price"></el-input>
      </el-form-item>
      <el-form-item label="市场价：">
        <el-input v-model="value.originalPrice"></el-input>
      </el-form-item>
      <el-form-item label="商品库存：">
        <el-input v-model="value.stock"></el-input>
      </el-form-item>
      <el-form-item label="计量单位：">
        <el-input v-model="value.unit"></el-input>
      </el-form-item>
      <el-form-item label="商品重量：">
        <el-input v-model="value.weight" style="width: 300px"></el-input>
        <span style="margin-left: 20px">克</span>
      </el-form-item>
      <el-form-item label="排序">
        <el-input v-model="value.sort"></el-input>
      </el-form-item>
      <el-form-item style="text-align: center">
        <el-button type="primary" size="medium" @click="handleNext('productInfoForm')">下一步，填写商品促销</el-button>
      </el-form-item>
    </el-form>
  </div>
</template>

<script>
import {fetchListWithChildren, getAllCategories} from '@/api/product/productCate'
import {fetchList as fetchBrandList} from '@/api/product/brand'
import {getProduct} from '@/api/product/product';

export default {
  name: "ProductInfoDetail",
  props: {
    value: Object,
    isEdit: {
      type: Boolean,
      default: false
    }
  },
  data() {
    return {
      hasEditCreated:false,
      //选中商品分类的值
      selectProductCateValue: [],
      productCateOptions: [],
      brandOptions: [],
      rules: {
        name: [
          {required: true, message: '请输入商品名称', trigger: 'blur'},
          {min: 2, max: 140, message: '长度在 2 到 140 个字符', trigger: 'blur'}
        ],
        subTitle: [{required: true, message: '请输入商品副标题', trigger: 'blur'}],
        productCategoryId: [{required: true, message: '请选择商品分类', trigger: 'blur'}],
        brandId: [{required: true, message: '请选择商品品牌', trigger: 'blur'}],
        description: [{required: true, message: '请输入商品介绍', trigger: 'blur'}],
        requiredProp: [{required: true, message: '该项为必填项', trigger: 'blur'}]
      }
    };
  },
  created() {
    this.getProductCateList();
    this.getBrandList();
  },
  computed:{
    //商品的编号
    productId(){
      return this.value.id;
    }
  },
  watch: {
    productId:function(newValue){
      if(!this.isEdit)return;
      if(this.hasEditCreated)return;
      if(newValue===undefined||newValue==null||newValue===0)return;
      this.handleEditCreated();
    },
    selectProductCateValue: function (newValue) {
      if (newValue != null && newValue.length === 2) {
        this.value.productCategoryId = newValue[1];
        this.value.productCategoryName= this.getCateNameById(this.value.productCategoryId);
      } else {
        this.value.productCategoryId = null;
        this.value.productCategoryName=null;
      }
    }
  },
  methods: {
    //处理编辑逻辑
    handleEditCreated(){
      if(this.value.productCategoryId!=null){
        this.selectProductCateValue.push(this.value.cateParentId);
        this.selectProductCateValue.push(this.value.productCategoryId);
      }
      this.hasEditCreated=true;
    },
    getProductCateList() {
      getAllCategories().then(response => {
        let formattedCategories = response.data.map(category => ({
          label: category.name,
          value: category.id,
          children: category.subCategories.map(subCategory => ({
            label: subCategory.name,
            value: subCategory.id
          }))
        })).map(category => {
          let children = [];
          if (category.children != null && category.children.length > 0) {
            children = category.children.map(child => ({
              label: child.label,
              value: child.value
            }));
          }
          return { label: category.label, value: category.value, children: children };
        });
        this.productCateOptions = formattedCategories;
        // console.log(this.productCateOptions)
      });
    },
    getBrandList() {
      fetchBrandList({pageNum: 1, pageSize: 100}).then(response => {
        this.brandOptions = [];
        let brandList = response.data.list;
        for (let i = 0; i < brandList.length; i++) {
          this.brandOptions.push({label: brandList[i].name, value: brandList[i].id});
        }
      });
    },
    getCateNameById(id){
      let name=null;
      for(let i=0;i<this.productCateOptions.length;i++){
        for(let j=0;j<this.productCateOptions[i].children.length;j++){
          if(this.productCateOptions[i].children[j].value===id){
            name=this.productCateOptions[i].children[j].label;
            return name;
          }
        }
      }
      return name;
    },
    handleNext(formName){
      this.$refs[formName].validate((valid) => {
        if (valid) {
          this.$emit('nextStep');
        } else {
          this.$message({
            message: '验证失败',
            type: 'error',
            duration:1000
          });
          return false;
        }
      });
    },
    handleBrandChange(val) {
      let brandName = '';
      for (let i = 0; i < this.brandOptions.length; i++) {
        if (this.brandOptions[i].value === val) {
          brandName = this.brandOptions[i].label;
          break;
        }
      }
      this.value.brandName = brandName;
    }
  }
}
</script>

<style scoped>
</style>
